Question

Resolva a equação: (1/3) ²˟-¹ = 9-²

Answer 1

$(\frac{1}{3} ) ^{2x-1} =9 ^{-2}$
$(3 ^{-1} ) ^{2x-1} =(3^2) ^{-2}$
$\not3 ^{-2x+1} =\not3 ^{-4}$
$-2x+1=-4$
$-2x=-4-1$
$-2x=-5$
$x= \frac{-5}{-2}$
$\boxed { x=\frac{5}{2} }$